The Influence of Coupled Faradaic and Charging Currents on Impedance Spectroscopy

The Influence of Coupled Faradaic and Charging Currents on Impedance Spectroscopy

The coupling of faradaic and charging currents is shown, by numerical simulation, to result in impedance responses showing high-frequency frequency dispersion that resembles pseudo-Constant-Phase-Element (CPE) behavior. The results show that coupling of faradaic and charging currents should be consi...

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Veröffentlicht in:Electrochimica acta 2014-06, Vol.131, p.3-12
Hauptverfasser: Wu, Shao-Ling, Orazem, Mark E., Tribollet, Bernard, Vivier, Vincent
Format: Artikel
Sprache:eng
Schlagworte:
Charging
Chemical Sciences
Computer simulation
CPE tungsten corrosion
Dispersions
Effective capacitance
Electrolytes
Frequency dispersion
Impedance
Joining
Mass transfer
Mathematical models
Other
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Beschreibung
Zusammenfassung:The coupling of faradaic and charging currents is shown, by numerical simulation, to result in impedance responses showing high-frequency frequency dispersion that resembles pseudo-Constant-Phase-Element (CPE) behavior. The results show that coupling of faradaic and charging currents should be considered when modeling the impedance response for systems influenced by mass transfer, even for large concentrations of supporting electrolyte.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2014.01.120